Rising front for cameras



Dec. 8 1925 322 c. BORNMANN RISING FRONT FOR CAMERAS Filed May 23, 1925 lNVENTOR 6/124 EZJ/F/V/VA/V/V Patented Dec. 8, 1925.

UNITED STJQIIEEZ rarest @E 'twE.

CARL BORNIi/IANN, OF BING-HAMTON, NEW YORK, ASS-FIGE'OR TO ANSCO PHOTO- PRODUGTS, INC., 033 BINGI-IAIVETOH, I TEvV YGRK.

RISING FRQNT FOR, CAMERAS.

Application filed May 23, 1925. Serial No. 32,432.

To all whom it may cancer/1.:

Be it known that I, CARL Bonmmnn, a citizen of the United States, and a resident of Binghamton, county of Broome, and State of New York, have invented a new and useful Improvement in a Rising Front for Cameras, of which thefollowing is a description, reference being had to the accompanying drawing, forming a part of this specification.

My invention relates generally to cameras, and particularly to a novel device for raising and lowering the front or lens carrying board thereof.

It is the object of my invention to provide such a rising front with operating means whereby the same may be raised or lowered easily and held securely in any adjusted position.

Another object is to provide a simple, cheap and effective lockingdevice for the controlling mechanism.

Other objects and advantages in details of construction and operation will be apparent as the description proceeds.

Referring now to the drawing wherein like reference numerals indicate like parts,

Figure 1 is a perspective view of a camera upon which is mounted my new rising front.

Figure '2 is a detailed front view partly in section showing clearly the operation of my invention.

Figure 3 is a detail section illustrating the operation of my improved locking device.

I have illustrated my invention as used in connection with a large view camera, and it is peculiarly adaptable to such a camera. It will be understood however that the same is not limited to such use, but may be applied to smaller cameras generally known as amateur or folding cameras upon which the front or lens carrying part is mounted for raising or lowering.

A camera 1 mounted upon a support or base 2, is provided with the usual extensible bellows 3 secured at the front end to a frame 4., usually slidable longitudinally upon the base 2 for the purpose of focusing. Mount-' ed for vertical sliding movement within the frame at is the front board or lens carrying member I have not shown the lens mounted therein inasmuch as this lens board is of conventional design provided with slideways 6 and T to receive a slide 8 provided centrally thereof with a flanged ring 9, defining an opening into which may be fitted any suitable lens and shutter.

lifeans are provided for raising and lowering the front board 5, including slots 10 and 11 cut through the sides of the frame 1. Projecting through these slots are the ends of a shaft 12 provided at each end with finger pieces 13. The shaft 12 is supported for rotation at the lower edge of the front board 5, as by means of bearings 14 and 15. Adjacent the ends of the shaft 12 are secured pinions 16 and 17 for engagement with the teeth of racks 18 and 19 secured to the legs of frame 1- within the recesses 10 and 11. It will be understood therefore, that the front board 5 may be raised or lowered within the guide slots 20 and 21 of the frame 4: by rotating the shaft 12 with either of the finger pieces 13.

Means are provided for locking and securely holding the front board 5 in any given adjusted position. This means comprises the small locking plate 22 secured as by rivets 23 to one lower corner of the front board 5 and at the edge thereof. This corner 24 is countersunk to receive the locking plate 22 as shown clearly in Figure 2. The lower end of the locking plate 22 is provided with teeth 25.

It will be noted from Figures 2 and 8, the teeth 25 of the locking plate lie directly adj acent to the pinion 16. The corner 24 of the front board 5 is recessed as at 26 to permit the engagement of the teeth of the pinion with the teeth 25 of the locking plate. The shaft 12 is slidable in its bearing 14 and 15 to permit such engagement.

It will be noted that the pinion 16 is so mounted with relation to the rack 18 that upon sliding the shaft 12 to the right in Figure 2, such pinion 16 disengages with the rack 18 and the teeth thereof mesh with the teeth of the locking plate 25. The pinion 17 on the other end. of the shaft 12 however, is so positioned that is does not become disengaged with the teeth of the rack 19 in either position of the shaft.

The operation of my invention is as follows: The operator of the camera desiring to raise or lower the lens board 5, slides the shaft 12 to the left in Figure 2, at which point both pinions 16 and 17 engage with their respective racks, whereupon the rotation of the shaft 12 thru the finger pieces 13 results in raising or lowering the lens board 5 depending upon the direction in which the shaft is turned. When the desired adjustment has been made, the oper ator simply slides the shaft 12 back to the right in Figure 2 whereupon the pinion 1G disengages with the rack 18 and the teeth thereof engage with the fixed teeth of the locking plate 22. The front board is thereupon securely locked in position and cannot be raised or lowered until the shaft 12 is again pulled to the left displacing the pinion 16 from the locking plate 22.

It will be understood of course that my invention is susceptible to many variations and changes in details of construction and operation without departing from the spirit and scope thereof as defined in the appended claims.

I claim:

1. A rising front for cameras comprising a slidable member, a shaft carried thereby provided with pinions, stationary racks with which said pinions engage whereby said member may be raised or lowered, and means on said member for locking the same in adjusted position.

2. A rising front for cameras comprising a slidable member, a shaft carried thereby provided with pinions, stationary racks with which said pinions engage whereby said member may be raised or lowered, and

means on said member and engagcable with one of said pinions for locking the member in adjusted position.

3. A rising front for cameras comprising a slidable member, a shaft carried thereby providedwith pinions, stationary racks with which said pinions engage whereby said member may be raised or lowered, and means on said member and engagcable with one of said pinions for locking the member in adjusted position, said means including stationary teeth.

4. A camera including a front frame provided with guide slots, a slidable member adjustable in said slots, stationary racks on said frame, pinions on said member en gageable with said racks whereby said member may be adjusted, a stationary toothed plate carried by said member with which one of said pinions is engageable to lock said member in adjusted position.

5. A rising front for cameras comprising a slidable member, rotatable and laterally slida-ble pinions on said member whereby the same may be adjusted, and means carried by said member with which one of said pinions engages for locking said member in adjusted position upon lateral movement of said pinion.

CARL BORNMANN. 

